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barxatty [35]
3 years ago
12

Solve for the given variable. List the step used to solve the equation. 49.75 + 4.99x = 9.99x + 19.75?​

Mathematics
1 answer:
Mrrafil [7]3 years ago
4 0

Answer:

x=-2

Step-by-step explanation:

9.75+4.99x=9.99x+19.75

Simply Both Sides(change the order of 9.75 and 4.99x in this case)

4.99x+9.75=9.99x+19.75

Subtract 9.99x from both sides

4.99x+9.75−9.99x=9.99x+19.75−9.99x

−5x+9.75=19.75

Subtract 9.75 from both sides now

−5x+9.75−9.75=19.75−9.75

−5x=10

Divide both sides by -5 and boom

−5x/-5=10/-5

x=−2

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How do you know if a whole number is a perfect square
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Answer:

you simply think of a number that when multiplied by itself it will give you that whole number

Step-by-step explanation:

let's take for instance the number 4 it's a whole number and still a perfect square because when you think of a number from 1to 10, which number when you multiply by itself will give you four apart from 2

4 0
3 years ago
Write 996.007 as a mixed number
Marianna [84]
996(7)/(10) should be correct.
6 0
4 years ago
Read 2 more answers
8. The speed of the current in a river is 6 mph. A ferry operator who works that part of the river is looking to buy a new boat
Natali [406]
Answer: the speed of the boat on the lake is 9 mph
Step-by-step explanation:
Let x represent the speed of the boat on the lake or in still water.
The speed of the current in a river is 6 mph. This means that if the boat goes upstream against the speed of the current, its total speed would be (x - 6)mph. If the boat goes downstream against the speed of the current, its total speed would be (x + 6)mph.
Time = distance/ speed
Every day, his route takes him 22.5 miles each way against the current and back to his dock, and he needs to make this trip in a total of 9 hours. This means that the time taken to travel upstream is
22.5/(x - 6). The time taken to travel downstream is
22.5/(x + 6)
Since the total time is 9 hours, it means that
22.5/(x - 6) = 22.5/(x + 6)
Cross multiplying, it becomes
22.5(x + 6) + 22.5(x - 6) = 9
Multiplying through by (x + 6)(x - 6), it becomes
22.5(x - 6) + 22.5(x + 6) = 9[(x + 6)(x - 6)]
22.5x - 135 + 22.5x + 135 = 9(x² - 6x + 6x - 36)
22.5x + 22.5x = 9x² - 324
9x² - 45x - 324 = 0
Dividing through by 9, it becomes
x² - 5x - 36 = 0
x² + 4x - 9x - 36 = 0
x(x + 4) - 9(x + 4) = 0
x - 9 = 0 or x + 4 = 0
x = 9 or x = - 4
Since the speed cannot be negative, then x = 9
3 0
2 years ago
Read 2 more answers
What’s 2 ways 3 people can share a 5 segment chewy fruit worm.?
Ad libitum [116K]

Answer:

give everyone one, then split the last two into thirds.

thats all i can think of so sorry :(

Step-by-step explanation:

4 0
3 years ago
Explain how u can decide where to place the first digit of the answer for 6,139 / 153
storchak [24]

Answer:

The first digit would go in the tens place.

Step-by-step explanation:

First we estimate the approximate numbers. For 6130 we estimate 6000 and for 153 we estimate almost 150.

So dividing 6000 by 150 would give 40 .

The four would go in the ten's place .

Now check by dividing

         40.1     So the answer is correct. The quotient is 40.12.

153\sqrt{6139}

<u>       612</u>

           190

<u>            153</u>

<u>              37 </u>

The first digit would go in the tens place.

The answer is justified. We can easily decide where to place the first digit.

6 0
4 years ago
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